bossard



(No Model.) 2 Sheets-Sheet 1.

A. BOSSARD.

ELECTRIC ARG LAMP.

No. 319,781. Patented Jupe 9, 1885.

N. PETERS PhoitrLikhOgrxphtr, Wuhlngnny D. C4

(N Model.) 2 Sheets-Sheet 2. A. BOSSARD.

ELEGTRIC-ARC LAMP.

No. 319,781'. PatentedJune 9, 1885.

UNITED STATES PATENT OFFICE.

AUGUST BOSSARD, OF NEW YORK, N. Y.

ELECTRIC-ARC LAMP.

SPECIFICATION forming part of Letters Patent No. 319,781, dated June 9, 1885.

Application filed July 24, 1884.

To a/ZZ whom it may concern:

Be it known that I, AUGUsT BossAED, a citizen of the United States, residing at New York, in the county of New York and State of New York, have invented certain newv and useful Improvements in Electric-Arc Lamps; and I do hereby declare the following to be a full, clear, and exact description of the invention, reference being had to the accompanying drawings, which form part of this specification, in which- Figure l is a side elevation of a lamp embodying my invention, the lower carbon-holder being omitted. Fig. 2 is a front elevation. Fig. 3 is a central sectional view of the shuntmagnet with sectional core.

This invention has relation to electricarc lamps, and has for its object to provide a lamp of simple construction which shall be absolutely sure in its action.

The invention consists in the novel construction and combination of parts, having reference particularly to, first, the provision of a shunt-magnet having a peculiarly-organized sectional core, one section being adjustable with relation to the other, so as to compensate for the varying conditions of the current; secondly, the provision of novel mechanism for effecting the feed of the upper carbon.

Referring to the accompanying drawings, A A are the top and bottom plates of the body of the lamp, and a a a2 a3 are the supports or connecting-posts which secure the parts of the frame or body together. B B are the rods or supports for the globe and lower-carbon holder. C is the main and D the shunt circuit magnets. The magnet C is attached to the upper plate of the lamp in any suitable manner, and has its armature c pivoted between the posts a a', near its outer edge, by pivots c2, the movement of the armature being limited and regulated by the screw d. The shuntmagnet D is placed between the posts a2 a3, and fastened to the posts by clips or other suitable means, so as to leave space between the upper end of the magnet and the plate A.

About midway between the bottom of' the magnet D and the bottom plate, A', is fastened to the posts a a a frame, F, to which is pivoted the rectangular frame G, said frame.

veapement-wheel.

(No model.)

G serving as a bearing for the regulating and adjusting devices, as follows: A shaft, g, having bearings in the opposite sides of the frame G, carries a pinion, H, and an escapementwheel, I, the pinion being rigidly attached to the shaft g, and the escapement-wheel coupled to said shaft by means of a ratchet, K, and dog 7c, so that the shaft and pinion may be rotated in one direction without giving motion to the es- The outer end of the pivoted frame G is held in position by a hook or arm, g', which is held by the armature c. The uppercarbon holder slides loosely through collars in the centers of the plates A A, and its movement is regulated by means ofthe rack .Z on its side, said rack being meshed with the pinion H and the movement of the rod4 controlled by the movement of the pinion. The escapement-wheel is governed by the escapement balance-pawl i, which is supported on the shaft M, having bearings in the upright arms G G of the frame G. 'Io the opposite end of the shaft M is attached the swinging balance, pendulum, or fan N, which regulates the speed of the escapement. To the upper part of the posta is xed the swinging arm o, having its lower edge serrated or toothed, as shown. The free end of this arm rests on a projecting arm or lug, s, attached to the upper end or part of the piston or suction armature d of the magnet D.

The operation of the lamp is as follows: The carbon-holder L being raised as far as may be necessary to insert the carbon, its weight will draw it downward, and, through its rack and the pinion, will operate the escapement and pendulum or fan till the points of the carbons meet. The circuit being established, the magnet C is energized and the armature c attracted toward the lower pole of the magnet, lifting with it the frame G and the carbon-holder L, thus separating the carbons and forming the arc. As the frame G is raised the upper part of the pendulum or fan N engages with the toothed arm o, and is by this means prevented from oscillating and allowing the carbon to drop down. As the carbon is consumed and the resistance of the circuit therethrough increased the current will energize the shuntmagnet D and draw the core-armature thereof roo toward its magnetic center.vv As the upper part of this V core extends-slightly above the top of the magnet and is encircled by the collar T, having lugs s, on the top of whichA rests the y end ofthe arm o, it will be seen that as the lower end of the core is drawn in toward the center of the magnet the upper end will be projected, and thus lift the arm o and release the pendulum or fan, allowing the carbon-holder to drop and the carbon-points to approach each other; and as the resistance is lowered the magnetD will cease to be effective, its core resuming its normal position', thus' allowing the arm o toA again engage with the pendulum.

As illustrated in Fig. 3 of the drawings, I

form the piston or suction armature of the `magnet Dl of two hollow and split cores, Rand the upper end of= the inner core and thelower l end of the outer core. l

. By4 regulating the distance to which the in-` ner core is inserted lI can exactly regulate the distance the magnet will attract its armature.

I have not shown a cut-out mechanism, as any of thev cut-out devices now in use may be employed, although I prefer the device shown in my application of even date herewith.

Having. described my invention, what I claim, and desire to secure by Letters Patent,

l1.VV I n an electric-arc lamp, the combination, with the carbon-feeding devices, of a tubular shunt-magnet having an adjustable or sliding pole-piece made in two sections telescoped together, substantially as described, and for the purpose set forth.

y 2, In an electricarc lamp, the combination, with the main or working magnet C, having its armature e located below its core and pivoted to the frame of the lamp, of the escapementsupporting frame G, pivoted at one end to the frame of the lamp, and at the other end resting or bearing upon the armature of the magnet C, whereby. when the armature c is attracted it will lift the frame G and separate the carbons, substantially as described.

y3. The combination, with'the oscillating ily escapement mechanism .and the main and shunt magnets, ofthe lug or arm s, attachedto the core of the shunt-magnet, and the toothed or serrated lever o, resting directly on said lug or arm, and engaging with the upper arm ot' the oscillating iiy, substantial-1y as described.

In testimony that I claim the foregoing .I have hereunto set my hand this 2d day oi" May, 1884.

AUGUST nossAnD,

fitnessesz THEODOR MNcH, H. KUGLER. 

